Fig. 3
Variation of [Ni/Fe] as a function of [Na/Fe] for solar analogues (Nissen 2015) and stars in the Kepler asteroseismic Legacy sample (Lund et al. 2017; Silva Aguirre et al. 2017) analysed by Nissen et al. (2017). All stars have –0.15 ≲ [Fe/H] ≲ +0.15. The dashed line shows the linear fit derived by Nissen (2015). The position of α Cen A and B is indicated as filled squares.
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